JP2010046765A - Dressing apparatus of buff roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that since a dressing operation is usually carried out with a buff roll attached in a buff roll type polishing device, a polishing operation is interrupted, and since the rotating speed of the buff roll can be set only to a low speed for the polishing operation, it is difficult to carry out the dressing operation with high accuracy. <P>SOLUTION: An exclusive dressing apparatus 1 includes a buff roll holding means (a support shaft) 5 for holding the buff roll (B) having in an outer periphery a non-woven fabric layer formed by fixing abrasive grains to fibers embrittled by heat, and a dressing roll (a rotary polishing machine) 67 which applies pressure to the buff roll (B) held by the buff roll holding means and slides to carry out the dressing operation. A dressing unit 13 provided with the dressing roll 67 is movable in a direction X1-X2 and a direction Y1-Y2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dressing apparatus for a bafrol attached to a buffol type polishing apparatus and used for polishing a plate-like workpiece such as a printed circuit board, and more particularly to a dressing dedicated apparatus that is a separate body from the polishing apparatus.

  When the polishing operation is performed with the baffle, the outer peripheral surface of the baffle is gradually worn away. During the wear process, the distribution of the fixed abrasive grains varies depending on the baffle, so that the outer surface of the baffle is worn unevenly, the work edge and protrusions are scratched on the outer surface of the buffol, It may become clogged. Furthermore, a step may be formed on the outer peripheral surface of the buffalo by leaving the outer peripheral surface not polished. Therefore, if the polishing operation is continued as it is, not only the polishing performance is deteriorated, but also abnormal vibration occurs or the backup roll disposed opposite to the baffle is worn.

Therefore, in order to recover the polishing performance of the buffalo and perform a stable polishing operation, it is necessary to appropriately perform a dressing operation.
Thus, the conventional dressing operation has been performed with the baffle attached to the buffalo polishing apparatus. Specifically, a flat polishing plate is fixedly disposed between the buffalo and the backup roll, and the baffle is rotated.

JP 2003-266297 A

  As described above, conventionally, since the dressing operation was performed with the buffol attached in the buffol polishing apparatus, it was necessary to interrupt the polishing operation. Moreover, the rotation speed of the buffalo can only be set to a slow one for polishing work, and it is difficult to perform dressing with high accuracy.

  Therefore, the present invention has been made paying attention to the above-mentioned conventional problems, and an object thereof is to provide a dedicated dressing apparatus.

The present invention has been made in order to solve the above-mentioned problems, and the invention of claim 1 holds a baffle in which a non-woven fabric layer in which abrasive grains are fixed to fibers that become brittle by heat is formed on the outer periphery. A buffol dressing device comprising a buffol holding means and a dressing roll that slides and performs dressing while applying pressure to the bafrol held by the buffol holding means.

  The invention of claim 2 is the dressing apparatus according to claim 1, further comprising a polishing amount adjusting means for adjusting the polishing amount of the bafrol.

  The invention of claim 3 is the dressing apparatus of claim 1 or 2, further comprising dressing roll moving means for moving the dressing roll in parallel with the axial direction of the baflor. .

  A fourth aspect of the present invention is the dressing apparatus according to any one of the first to third aspects, further comprising a baffle rotating means for rotating the baffle held by the baffle holding means. is there.

  The invention of claim 5 is the dressing apparatus according to any one of claims 1 to 4, further comprising a fiber removing means for removing fibers on the outer peripheral surface of the bafrol.

  According to a sixth aspect of the present invention, there is provided a dressing apparatus for buffalo according to the fifth aspect, wherein the fiber removing means is constituted by a hot air blowing means having a hot air blowing port opposed to the outer peripheral surface of the baffle. Dressing device.

  The dressing apparatus of the present invention is a dedicated apparatus for performing dressing by attaching the baffle removed from the buffing apparatus, and can perform dressing with high accuracy.

A dressing apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings.
First, the configuration of the dressing device 1 will be described.
The dressing target bafrol (B) is conventionally used as a buffol in a buffol type polishing apparatus and has a cylindrical shape.
As shown in FIG. 1, reference numeral 3 denotes an apparatus main body, and a space for attaching a baffle (B) opened forward and upward is provided on the front side of the apparatus main body 3, and the space is defined. A pair of cylindrical support shafts 5 and 5 are attached to the opposite inner walls on the left and right sides, respectively. The support shafts 5 and 5 are relatively inserted into both end portions in the axial direction of the buffalo (B), so that the buffalo (B) is attached to the apparatus main body 3.

Reference numeral 7 denotes an operating lever, and this operating lever 7 is connected to a nearby support shaft 5 via an appropriate force transmission means. When the operation lever 7 is operated, the support shaft 5 is moved back and forth. When the support shaft 5 moves backward, the attachment and detachment of the baffle (B) are performed, and when the operation lever 7 moves forward, the baffle (B) is locked. The baffle holding means is composed of support shafts 5 and 5, an operation lever 7 and the like.
Reference numeral 9 denotes a setting button for dressing work described later, and reference numeral 11 denotes a display unit for displaying setting conditions and the like.

The back side of the attachment space of the baffle (B) of the apparatus body 3 is a space for accommodating and moving the dressing unit 13, and a part of the front and upper sides are opened.
Reference numeral 15 denotes a bellows cover. One end of the bellows cover 15 is attached to the inner wall (FIG. 1) on the right side of the apparatus main body, and the other end is attached to the dressing unit 13, and a lower space is provided between the inner wall and the dressing unit 13. Shielding.
Since the bellows cover 15 can be expanded and contracted following the movement of the dressing unit 13, the polishing dust from the baffle (B) is introduced into the apparatus main body 3 from the front side of the dressing unit 13 without hindering the movement of the dressing unit 13. Is prevented from entering.

A pair of guide rails 17, 17 shown in FIG. 2 is disposed under the bellows cover 15, and a ball screw shaft 19 serving as a feeding means is disposed in parallel between the pair of guide rails 17, 17. Yes. Both ends of the pair of guide rails 17 and 17 and the ball screw shaft 19 are fixed to the apparatus main body that determines the accommodation space of the dressing unit 13.
The pair of guide rails 17 and 17 and the ball screw shaft 19 are provided so as to be parallel to the axial direction of the baffle (B) attached to the pair of support shafts 5 and 5. One of the support shafts 5 and 5 is connected to the output shaft (not shown) of the motor, and the buffalo (B) is configured to rotate by the rotational driving force from the motor. The motor, the support shafts 5, 5 and the like constitute a baffle rotating means.

The configuration of the dressing unit 13 will be described with reference to FIGS.
Reference numeral 21 denotes a portal slider, and the slider 21 is slidably supported by the pair of guide rails 17 described above. Further, a nut portion (not shown) is attached to the lower portion of the slider 21, and the above-described ball screw shaft 19 is screwed to the nut portion. A support block 23 is fixed to the slider 21. Bearing blocks 25 and 25 are attached to both sides of the support block 23, respectively.
As shown in FIG. 3, cylindrical shafts 27 and 27 are supported by the bearing blocks 25 and 25 so as to be movable in the X1-X2 direction. Both end portions of each shaft 27 protrude from the bearing block 25. Female screws (not shown) are formed on the inner peripheral surfaces of the both ends of each shaft 27.

Reference numeral 29 denotes a support plate on one side, and this support plate 29 has a flat plate shape, and a square portion is integrally formed on a trapezoidal portion. Bolts 31, 31 are respectively inserted into both lower end portions of the support plate 29 and screwed into and connected to the female screw of the shaft 27 described above.
Reference numeral 33 denotes a motor as drive means, and a motor body 35 of the motor 33 is fixed on the support block 23. The rectangular portion of the support plate 29 is attached to and supported by the motor body 35 so as to be movable in the X1-X2 direction.

An output shaft 37 of the motor 33 protrudes from the support plate 29 so as to be rotatable, and one belt pulley 39 is connected to the output shaft 37. The opposite belt pulley 41 of the belt pulley 39 is disposed below the belt pulley 39, and a belt 43 is stretched around the belt pulleys 39 and 41.
Reference numeral 45 denotes a concave / convex disc made of a magnetic material and having an outer peripheral portion that is concave / convex. The concave / convex disc 45 is connected to the belt pulley 41. Reference numeral 47 denotes a sensor unit, and the sensor unit 47 is disposed in proximity to the concave / convex disk 45. The concavo-convex disk 45 and the sensor unit 47 constitute a proximity sensor, and the rotational speed of the concavo-convex disk 45 that rotates in conjunction with the belt pulley 41 is detected.

As shown in the top view of FIG. 4 (the motor body 35 is not shown), a ball screw shaft 49 is connected to the belt pulley 41. Reference numeral 51 denotes a nut portion, and a ball screw shaft 49 is screwed into the nut portion 51. The nut portion 51 is fitted and fixed in the through hole of the support plate 29.
Reference numeral 53 denotes a coil spring. The coil spring 53 surrounds the ball screw shaft 49 and the nut portion 51, one end of which is attached to the inner surface of the support plate 29 and the other end is attached to the support block 23 side. The support plate 29 is biased by the coil spring 53 in a direction away from the support block 23.
Reference numeral 55 denotes a support plate on the other side, and this support plate 55 has a flat plate shape and is formed in a square shape. Bolts 57 and 57 are respectively inserted into both end portions of the support plate 55 and screwed into and connected to the female screw of the shaft 27 described above.

  Reference numeral 59 denotes a motor as drive means. As shown in FIG. 4, the motor main body 61 of the motor 59 is fixed to the side surface of the support plate 55 through appropriate connection means. A rotary polishing disc 67 as a dressing roll is inserted through the tip of the output shaft 65 of the motor 59. A large-diameter outer peripheral portion of the rotary polishing board 67 is a polishing portion 69. A male screw is formed on the distal end side of the output shaft 65, and a nut 71 is screwed into the male screw to fix the rotary polishing disc 67 to the output shaft 65. Reference numeral 73 denotes a polishing portion cover, and the polishing portion cover 73 has a box shape. The polishing portion cover 73 covers most of the rotary polishing disc 67 including the polishing portion 69.

Reference numeral 75 denotes a concave / convex disc made of a magnetic material and having an outer peripheral portion that is concave / convex. The concave / convex disc 75 is connected to the motor main body 61 side of the rotary polishing disc 67. Reference numeral 77 denotes a sensor unit, and a screw shaft 79 is externally fitted to the sensor unit 77. The screw shaft 79 is inserted into a bracket 81 fixed to the support plate 55, and is fastened and fixed with nuts 83 from both sides. The sensor unit 77 is disposed close to the concave and convex disk 75. The concavo-convex disk 75 and the sensor unit 77 constitute a proximity sensor, and the number of rotations of the concavo-convex disk 75 that rotates in conjunction with the rotary polishing board 67 is detected.
Reference numeral 85 denotes a substantially flat motor cover, and the motor cover 85 covers the upper surface of the motor body 61.

Reference numeral 87 denotes a heater. In the heater body 89 of the heater 87, a heating wire 91 such as a nichrome wire is wound around and accommodated in a bobbin. As shown in FIG. 2, one end of the heater main body 89 is interposed between a blower (not shown) and the heater main body 89 and is supplied with air by driving the blower, and a terminal of the heating wire 91. One end of the electric cord 95 is connected to an electric cord 95 that generates heat by supplying current from a power source (not shown) to the heating wire 91.
Reference numeral 97 denotes a hot air blowing hose. One end of the hot air blowing hose 97 is connected to the heater main body 89 and extends in parallel to the polishing portion 69, and the other hot air blowing port 99 is an outer periphery of the baffle (B). It faces the surface.
The fiber removing means is constituted by the heater 87, the hot air blowing hose 97, and the like.

The X1-X2 direction moving mechanism of the rotary polishing board 67 will be described.
The rotational driving force of the motor 33 is transmitted through the output shaft 37, the belt pulley 39, the belt 43, and the belt pulley 41 to rotate the ball screw shaft 49. The ball screw shaft 49 is screwed into the nut portion 51, and is converted into a straight driving force by the nut portion 51. Since the support plate 29, the shafts 27, 27, and the support plate 55 are integrally connected to the nut portion 51, the nut shaft 51, the support plate 29, the shafts 27, 27, and the support plate 55 are rotated when the ball screw shaft 49 is rotated. Integrally move in the X1-X2 direction. The support plate 55 is connected to the motor main body 61 of the motor 59, and the output shaft 65 is connected to the rotary polishing disc 67 having the polishing portion 69 provided on the outer peripheral portion. Will move in the X1-X2 direction.

The rotation mechanism of the rotary polishing board 67 will be described.
The rotational driving force of the motor 59 is transmitted through the output shaft 65 to rotate the rotary polishing disc 67 provided with the polishing portion 69 on the outer peripheral portion. Therefore, the rotary polishing disc 67 is rotated by driving the motor 59.

The Y1-Y2 direction moving mechanism of the rotary polishing board 67 will be described.
The rotational driving force of an appropriate motor (not shown) is transmitted through its output shaft and the like, and rotationally drives the ball screw shaft 19. The ball screw shaft 19 is screwed into a nut portion (not shown) integrally provided on the lower side of the slider 21, and is converted into a straight driving force by the nut portion. Since the slider 21 and the dressing unit 13 (including a rotary polishing disc 67 having a polishing portion 69 provided on the outer peripheral portion) are integrally connected to the nut portion, when the ball screw shaft 19 rotates. The dressing unit 13 moves integrally in the Y1-Y2 direction. Accordingly, the rotary polishing disc 67 moves in parallel to the axial direction of the buffalo (B).

The motors 33 and 59 and the sensor units 47 and 77 are connected to a control unit (not shown), and the control unit drives the motors 33 and 59 and moves the dressing unit 13.
The X1-X2 moving mechanism and the proximity sensor provided in the mechanism constitute a polishing amount adjusting means.

The operation of the dressing apparatus 1 will be described.
In the standby mode, the rotary polishing board 67 is disposed opposite to one end of the positioned and fixed baffle (B) with a gap.
Before performing the dressing operation, the polishing amount of the buffalo (B), specifically, the depth of cut (= the distance removed by polishing from the reference position) is adjusted. First, as shown in FIG. 5 (a), the rotating grinder 67 in a stopped state is moved in the X1 direction to approach the rotating baffle (B). As shown in FIG. 5B, when the rotary polishing plate 67 hits the buffalo (B), the rotational force of the buffalo (B) is transmitted to the rotary polishing plate 67, and the concavo-convex disk 75 of the proximity sensor is formed together with the rotary polishing plate 67. Rotate. When the control unit detects the rotation of the rotary polishing board 67 via the sensor unit 77, the control unit stops driving the motor 33 and stops the dressing unit 13. The stop position of the dressing unit 13 becomes the reference position.
Next, when the operator operates the setting button 9 to input a desired depth of cut (= distance to be removed by polishing from the reference position), the control unit further moves the dressing unit 13 in the X1 direction from the reference position. Move it by that depth and then stop again.
Thereby, the adjustment of the cutting depth is completed.

After that, the dressing operation is started.
As shown in FIG. 6, the rotary polishing board 67 rotates, and the polishing section 69 slides while pressing the buffalo (B) to perform dressing. During dressing, since the dressing unit 13 moves at a predetermined constant speed in the Y1 direction, the rotary polishing board 67 is opposed to the other end of the baffle (B) while dressing the buffule (B) (shown by an imaginary line). )
Although the dressing operation may be completed once as described above, the dressing unit 13 may be reciprocated in the Y1-Y2 direction and repeated to perform dressing a plurality of times.
As described above, since the depth of cut is adjusted so as to be uniform with respect to the axial direction of the bafrol (B), the roundness of the bafrol (B) after the dressing operation is high.

  When the dressing operation is completed, the outer peripheral portion of the dressed portion of the baffle (B) changes as shown in FIG. 8 (a) to FIG. 8 (b), and the abrasive grains (p) are removed from the upper layer fibers (f). It has been detached.

Next, a fiber removing operation by heating the fibers is performed.
As shown in FIG. 8 (a), a nonwoven fabric layer in which abrasive grains (p), for example, diamond abrasive grains are fixed to fibers (f) that are embrittled by heat, for example, nylon fibers, on the outer peripheral portion of the bafrol (B). Is formed. On the other hand, when dressing is performed as described above, the fibers (f) from which the abrasive grains (p) are detached remain as shown in FIG.
As shown in FIG. 7, with the rotary polishing disc 67 retracted from the baffle (B) and separated, this time the heater 87 is driven, and hot air of about 300 ° C., for example, is heated from the hot air outlet 99. Spray against the opposing buffalo (B).
During fiber removal, since the dressing unit 13 moves at a predetermined constant speed in the Y1 direction, the hot air is blown onto the buffalo (B) and heads to a position (shown by a dotted line) that faces the other end of the buffalo (B). . The fiber removal operation may be terminated when the position is reached, but the dressing unit 13 may be reciprocated in the Y1-Y2 direction and repeatedly processed.

  When the fiber removal operation is completed, as shown in FIG. 8 (c), the upper layer fiber (f) from which the abrasive grains (p) have been detached from the dressing melts and burns and becomes brittle while being curled and detached. ing.

According to this embodiment, the rotational speed of the rotary polishing plate 67 of the dressing apparatus 1 can be set faster than the rotational speed of the buffling which can be set by the buffling polishing apparatus, and the polishing of the bafrol (B) can be performed as compared with the case of manual dressing. Since the amount can be adjusted to be uniform at any position in the axial direction, it is possible to dress the buffalo (B) with high accuracy. In addition, since the amount of polishing can be adjusted freely, dressing can be performed as much as necessary.
In addition, since the fibers can be removed after dressing as described above, there is almost no need to discard and polish. Moreover, the polishing operation can be continued if another baffle is attached to the buffol polishing apparatus while the buffalo (B) is being used for the dressing operation. It becomes only.

The embodiment of the present invention has been described in detail above. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change without departing from the gist of the present invention. included.
For example, a moving mechanism using a ball screw shaft is employed, but this is because braking is easy, and another moving mechanism may be employed if this point is sacrificed.

  According to the dressing apparatus of the present invention, since the dressing can be performed with high accuracy, there is no fear that the buffalo (B) is made thinner than necessary. Moreover, since the buffalo polishing operation is hardly interrupted, the processing efficiency is not lowered. Therefore, it is economical.

It is a perspective view of the dressing apparatus concerning an embodiment of the invention. It is the perspective view seen from the front side of the dressing unit of the dressing apparatus of FIG. It is the perspective view seen from the back side of the dressing unit of the dressing apparatus of FIG. It is a top view of the dressing unit of FIGS. It is operation | movement explanatory drawing in the dressing of the dressing apparatus of FIG. It is operation | movement explanatory drawing in the dressing of the dressing apparatus of FIG. It is operation | movement explanatory drawing in the fiber removal of the dressing apparatus of FIG. It is explanatory drawing which shows the state of the outer peripheral surface of a buffalo before a work, after a dressing work, and after a fiber removal work.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Dressing apparatus 3 ... Apparatus body 5, 5 ... Support shaft 7 ... Operation lever 9 ... Setting button 11 ... Display part 13 ... Dressing unit 15 ... Bellows cover 17 ... Guide rail 19 ... Ball screw shaft 21 ... Slider 23 ... Support block 25 Bearing block 27, 27 Shaft 29, 55 Support plate 31 Bolt 33 Motor 35 Motor body 37 Output shaft 39, 41 Belt pulley 43 Belt 47 Sensor section 49 Ball screw shaft 51 Nut section 53 Coil spring 57 Bolt 59 Motor 61 Motor body 65 Output shaft 67 Rotary grinder 69 Polishing section 71 Nut 73 Polishing section cover 75 Concave and convex disc 77 Sensor section 79 Screw shaft 81 Bracket 83 Nut 85 Motor cover 87 Heater 89 Heater body 91 ... Heating wire 93 ... Air hose 95 ... Electric cord 97 ... Hot air blowout hose 99 ... Hot air blowout port B ... Bafrol p ... Abrasive grain f ... Fiber

Claims (6)

  A baffle holding means for holding a buffol formed with a nonwoven fabric layer in which abrasive grains are fixed to fibers that are embrittled by heat at the outer periphery, and sliding while applying pressure to the baffle held by the buffol holding means A dressing apparatus for buffalo, comprising a dressing roll for performing dressing.   The dressing apparatus according to claim 1, further comprising a polishing amount adjusting means for adjusting a polishing amount of the baflor.   The dressing apparatus according to claim 1 or 2, further comprising dressing roll moving means for moving the dressing roll in parallel with the axial direction of the baflor.   4. The dressing apparatus according to claim 1, further comprising a baffle rotating unit that rotates the baffle held by the buffol holding unit.   5. The dressing apparatus for a baflore according to any one of claims 1 to 4, further comprising a fiber removing means for removing fibers on the outer peripheral surface of the baflore.   6. A dressing apparatus for buffol according to claim 5, wherein the fiber removing means is constituted by a hot air blowing means having a hot air blowing port opposed to the outer peripheral surface of the bafrol.

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